circleをドラッグして移動する

/**
 * Copyright 110R ( http://wonderfl.net/user/110R )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/yqSS
 */

package {
    import flash.display.Sprite;
    import flash.events.MouseEvent;
    public class MouseDrag extends Sprite {
        public function MouseDrag() {
            var circle:Sprite=new Sprite();
            
            circle.graphics.beginFill(Math.random()*0xffffff);
            circle.graphics.drawCircle(0,0,20);
            circle.graphics.endFill();
            
            addChild(circle);
            
            circle.buttonMode=true;
            circle.x=232;
            circle.y=232;
            
            circle.addEventListener(MouseEvent.MOUSE_DOWN,onMouseDown);
            circle.addEventListener(MouseEvent.MOUSE_UP,onMouseUp);
        }
        private function onMouseDown(e:MouseEvent):void{
        	e.currentTarget.startDrag();
    }
    private function onMouseUp(e:MouseEvent):void{
    	e.currentTarget.stopDrag();
}
    }
    }